Aventine Hill - The Knights of Malta gate

If you peek through this keyhole you will see a garden that beautifully frames the cupola of St. Peter's. The gardens belong to the Villa del Priorato di Malta. This experience is free. You can arrive by foot from Circus Maximus by walking up the hill. There are also several tours that include this site on their itineraries such as Panoramic Electric-Assist Bike Tour of Rome